Average Error: 30.0 → 29.9
Time: 35.1s
Precision: 64
Ground Truth: 128
\[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
\[e^{{\left(\sqrt[3]{\log \left(e^{\frac{\log \left(x + 1\right)}{3}} - {x}^{\left(\frac{1}{3}\right)}\right)}\right)}^3}\]

Error

Bits error versus x

Derivation

  1. Initial program 30.0

    \[{\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\]
  2. Using strategy rm
  3. Applied add-exp-log 30.0

    \[\leadsto \color{blue}{e^{\log \left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\right)}}\]
  4. Using strategy rm
  5. Applied add-cube-cbrt 30.0

    \[\leadsto e^{\color{blue}{{\left(\sqrt[3]{\log \left({\left(x + 1\right)}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\right)}\right)}^3}}\]
  6. Using strategy rm
  7. Applied add-exp-log 30.1

    \[\leadsto e^{{\left(\sqrt[3]{\log \left({\color{blue}{\left(e^{\log \left(x + 1\right)}\right)}}^{\left(\frac{1}{3}\right)} - {x}^{\left(\frac{1}{3}\right)}\right)}\right)}^3}\]
  8. Applied pow-exp 30.1

    \[\leadsto e^{{\left(\sqrt[3]{\log \left(\color{blue}{e^{\log \left(x + 1\right) \cdot \frac{1}{3}}} - {x}^{\left(\frac{1}{3}\right)}\right)}\right)}^3}\]
  9. Applied simplify 29.9

    \[\leadsto e^{{\left(\sqrt[3]{\log \left(e^{\color{blue}{\frac{\log \left(x + 1\right)}{3}}} - {x}^{\left(\frac{1}{3}\right)}\right)}\right)}^3}\]
  10. Removed slow pow expressions

Runtime

Total time: 35.1s Debug log

Please report a bug with the following info:

herbie --seed '#(392759749 2789474697 2109486235 604602605 319265141 32030129)'
(FPCore (x)
  :name "NMSE problem 3.3.4"
  (- (pow (+ x 1) (/ 1 3)) (pow x (/ 1 3))))